You are the yellow bulldozer in the middle of the screen. You have three lives at the start. There is no way to get more lives.
You move the bulldozer around the playing field by pressing the arrow keys on the keyboard. The mouse CANNOT be used to move the bulldozer. The mouse can only be used to Pause the game and to select from the menus.
The gray walls are solid and cannot be moved or passed through. (unless the gray pass wall power item has been hit)
The blue blocks are movable and are to be used to kill snakes. You can push one or more blue blocks at a time.
The purple snakes move randomly about the screen. The snakes can be killed by pushing the blocks into them. Pushing a blue block into a snake will kill the segment that you hit, and all segments that were cut-off from the head. To kill the whole snake the blue block must be pushed into the head of the snake.
There are 10 snakes on each world. To move to the next world, all 10 snakes must be killed.
Red Power Rocks will appear from time to time. If you run over one, your bulldozer becomes red for several seconds. During this time you cannot be killed by snakes. You can run directly into snakes and kill them. When the bulldozer turns a dark shade of red the Power-Rock time is about to run out.
Blue Time Warps will appear from time to time. They look like clocks. If you run over one, the snakes will freeze for several seconds. You can then push blocks into the immobile snakes. If you hit a frozen snake, you will still die.
Gray Pass Wall Rocks will appear from time to time. If you run over one, you can go through the gray wall for several seconds.